First and second boosters are attached to a holder in the following manner to prevent a portion between the first and second boosters from being curved. The outer side surface of a projecting portion on the outer peripheral surface of a second booster is pressed toward the inward of the holder by a stopper attached to the holder so that a stepped portion formed in the interior surface of the holder is pressed by the projecting portion through a bridge member and a projecting portion on the outer peripheral surface of the first booster.
A workpiece, in which a lead is laid on top of a three-dimensional porous metal body, is placed between an ultrasonic horn and an anvil with a lead portion facing the ultrasonic horn. A support is raised so that the lead portion of the workpiece is pressed between the ultrasonic horn and the anvil. While being rotated around a central shaft with a motor, the ultrasonic horn vibrates at a frequency of 20 kHz in the shaft direction. Thus, the workpiece is advanced continuously, so that the lead is bonded ultrasonically to the three-dimensional porous metal body (i.e., metal-to-metal bonding is established). It is possible to provide a battery electrode that can be produced continuously at a lower running cost, reduce the faulty welding with a current collecting plate, and prevent short-circuits.
A bonding tool for bonding electronic components by ultrasonic vibration. The bonding tool includes a horn supported by two ribs from both sides, and a transducer is attached to an end of this horn. A protrusion protruding downward from the center between the ribs is provided on the horn, and a tip of the protrusion is a bonding portion which contacts the electronic component. The transducer is driven to apply vertical vibration to the horn. A phase of vertical expansion and compression vibration on the horn generated by this vertical vibration is set to have the same phase as that of bending vibration on the protrusion. Accordingly, displacement by expansion and vertical vibration at side ends of the bonding portion is canceled out by displacement caused by bending vibration.
An ultrasonic vibration bonding tool comprising a square bar-like horn body, bonding working portions projecting from the upper and lower surfaces of the horn body at the central maximum vibration amplitude point, and crooked support portions projecting from front and rear surfaces of the horn body at the two minimum vibration amplitude points which are separate the same distance from the bonding working portions on both sides. Proper bonding can be carried out with this ultrasonic vibration bonding tool.
A workpiece, in which a lead is laid on top of a three-dimensional porous metal body, is placed between an ultrasonic horn and an anvil with a lead portion facing the ultrasonic horn. A support is raised so that the lead portion of the workpiece is pressed between the ultrasonic horn and the anvil. While being rotated around a central shaft with a motor, the ultrasonic horn vibrates at a frequency of 20 kHz in the shaft direction. Thus, the workpiece is advanced continuously, so that the lead is bonded ultrasonically to the three-dimensional porous metal body (i.e., metal-to-metal bonding is established). It is possible to provide a battery electrode that can be produced continuously at a lower running cost, reduce the faulty welding with a current collecting plate, and prevent short-circuits.
An ultrasonic horn assembly for applying ultrasonic energy at an operating location which assembly includes a connector between horn assembly components which provides uniform clamping pressure between transfer faces of the components.
